it's just been the odd comment, like
http://scuderiafans.com/ferraris-rear-s ... ng-issues/"Mattia Binotto’s reference to the mechanical aspects of the car is interesting, as it coincides with rumours Ferrari’s problem is with the clever hydraulic rear suspension systems used up and down the grid."
plus the impression they've been quite variable with their setups. Perhaps it's more difficult than complicated. Tho there was a rumour they had to change the front suspension late on that the rake depended on